Media Remoting: Add interstitial elements to media element shadow dom.

third_party/WebKit/public/blink_image_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1" output_all_resource_defines="false">
   <outputs>
     <output filename="grit/blink_image_resources.h" type="rc_header" context="default_100_percent">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="blink_image_resources_100_percent.pak" type="data_package" context="default_100_percent" />
     <output filename="blink_image_resources_200_percent.pak" type="data_package" context="default_200_percent" />
   </outputs>
   <release seq="1">
     <structures fallback_to_low_resolution="true">
       <structure type="chrome_scaled_image" name="IDR_BROKENIMAGE" file="blink/broken_image.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_PAUSE_BUTTON" file="blink/mediaplayer_pause.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_PLAY_BUTTON" file="blink/mediaplayer_play.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_SOUND_NOT_MUTED_BUTTON" file="blink/mediaplayer_sound_not_muted.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_SOUND_MUTED_BUTTON" file="blink/mediaplayer_sound_muted.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_SLIDER_THUMB" file="blink/mediaplayer_slider_thumb.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_VOLUME_SLIDER_THUMB" file="blink/mediaplayer_volume_slider_thumb.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON" file="blink/mediaplayer_closedcaption.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CLOSEDCAPTION_BUTTON_DISABLED" file="blink/mediaplayer_closedcaption_disabled.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_ENTER_FULLSCREEN_BUTTON" file="blink/mediaplayer_enter_fullscreen.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_EXIT_FULLSCREEN_BUTTON" file="blink/mediaplayer_exit_fullscreen.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CAST_BUTTON_OFF" file="blink/mediaplayer_cast_off.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CAST_BUTTON_ON" file="blink/mediaplayer_cast_on.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_CAST_BUTTON_OFF" file="blink/mediaplayer_overlay_cast_off.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_CAST_BUTTON_ON" file="blink/mediaplayer_overlay_cast_on.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON" file="blink/mediaplayer_overlay_play.png" />
+      <structure type="chrome_scaled_image" name="IDR_MEDIA_REMOTING_DISABLE_BUTTON"
+      file="blink/mediaremoting_disable.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_TRACKSELECTION_CHECKMARK" file="blink/mediaplayer_trackselection_checkmark.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CLOSEDCAPTIONS_ICON" file="blink/mediaplayer_closedcaptions_icon.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERFLOW_MENU_ICON" file="blink/mediaplayer_overflow_menu.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_DOWNLOAD_ICON" file="blink/mediaplayer_download.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_SUBTITLES_ICON" file="blink/mediaplayer_subtitles_icon.png" />
       <structure type="chrome_scaled_image" name="IDR_SEARCH_CANCEL" file="blink/search_cancel.png" />
       <structure type="chrome_scaled_image" name="IDR_SEARCH_CANCEL_PRESSED" file="blink/search_cancel_pressed.png" />
       <structure type="chrome_scaled_image" name="IDR_TEXTAREA_RESIZER" file="blink/textarea_resize_corner.png" />
       <structure type="chrome_scaled_image" name="IDR_PASSWORD_GENERATION_ICON" file="blink/password_generation.png" />
       <structure type="chrome_scaled_image" name="IDR_PASSWORD_GENERATION_ICON_HOVER" file="blink/password_generation_hover.png" />
     </structures>
   </release>
 </grit>